Construction beam



FIG. 1 is a perspective view of a construction beam showing my new design;

FIG. 2 is an end elevational view thereof;

FIG. 3 is a front view thereof viewed in the direction of arrow 3 of FIG. 2; and

FIG. 4 is a rear view thereof viewed in the direction of arrow 4 of FIG. 2. 

The ornamental design for a construction beam, as shown. 